Bug 1308743
Summary: | [RFE] PAPR Hash Page Table (HPT) resizing (libvirt) | |||
---|---|---|---|---|
Product: | Red Hat Enterprise Linux 7 | Reporter: | Karen Noel <knoel> | |
Component: | libvirt | Assignee: | Andrea Bolognani <abologna> | |
Status: | CLOSED ERRATA | QA Contact: | Dan Zheng <dzheng> | |
Severity: | medium | Docs Contact: | ||
Priority: | unspecified | |||
Version: | 7.3 | CC: | abologna, bugproxy, dgibson, dyuan, dzheng, gsun, hannsj_uhl, jsuchane, mdeng, michen, qzhang, rbalakri, virt-bugs, virt-maint, xuhan, xuma | |
Target Milestone: | rc | Keywords: | FutureFeature | |
Target Release: | 7.5 | |||
Hardware: | ppc64le | |||
OS: | Linux | |||
Whiteboard: | ||||
Fixed In Version: | libvirt-3.9.0-3.el7 | Doc Type: | Enhancement | |
Doc Text: | Story Points: | --- | ||
Clone Of: | 1305398 | |||
: | 1308744 1308746 (view as bug list) | Environment: | ||
Last Closed: | 2018-04-10 10:36:45 UTC | Type: | Bug | |
Regression: | --- | Mount Type: | --- | |
Documentation: | --- | CRM: | ||
Verified Versions: | Category: | --- | ||
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
Cloudforms Team: | --- | Target Upstream Version: | ||
Embargoed: | ||||
Bug Depends On: | 1305398 | |||
Bug Blocks: | 1248279, 1284775, 1308744, 1308746, 1399177, 1444027, 1469590 |
Description
Karen Noel
2016-02-15 22:26:47 UTC
No changes should be needed in libvirt to support HPT resizing per se. However (small) changes might be necessary in order for layers above libvirt to control the "resize-hpt" qemu machine property via libvirt. The property can be "disabled" - don't permit HPT resizing, "enabled" - permit HPT resizing or "required" permit HPT resizing and refuse to boot guests which don't support it. I'm trying to figure out exactly what changes are needed to libvirt in order to support this. I assume the interface won't change a great deal before being merged, maybe just use slightly different names and stuff like that. Being a machine property, you'd use it along the lines of -machine pseries,resize-hpt=enabled right? Can the value be altered at runtime, or is it going to be decided by this command line option alone? > I assume the interface won't change a great deal before being merged, maybe just use slightly different names and stuff like that. Yes, that's what I'm assuming as well. > Being a machine property, you'd use it along the lines of > > -machine pseries,resize-hpt=enabled > > right? Can the value be altered at runtime, or is it going to be decided by this command line option alone? That's right. The value can not be changed at runtime, it's just set on the commandline then stays that way. Required qemu and host kernel bugs have been deferred to 7.5, so deferring this one as well. Patches posted upstream. https://www.redhat.com/archives/libvir-list/2017-November/msg00190.html Fix merged upstream. commit 85b2ae96dfcf7dc324d6782f64c848fa412443e4 Author: Andrea Bolognani <abologna> Date: Mon Nov 6 16:39:40 2017 +0100 qemu: Enable configuration of HPT resizing for pSeries guests Most of the time it's okay to leave this up to negotiation between the guest and the host, but in some situations it can be useful to manually decide the behavior, especially to enforce its availability. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1308743 Signed-off-by: Andrea Bolognani <abologna> Reviewed-by: John Ferlan <jferlan> v3.9.0-130-g85b2ae96d Test packages: libvirt-3.9.0-6.el7.ppc64le qemu-kvm-rhev-2.10.0-13.el7.ppc64le kernel-3.10.0-823.el7.ppc64le (host and guest) Case 1: Libvirt report reasonable messages for incorrect qemu version # rpm -q qemu-kvm-rhev qemu-kvm-rhev-2.9.0-16.el7_4.13.ppc64le <features> <hpt resizing='enabled'/> </features> # virsh start vm1 error: Failed to start domain vm1 error: unsupported configuration: HTP resizing is not supported by this QEMU binary Case 2: Set hpt resizing 'disabled' Start guest with below setting, guest is started. <features> <hpt resizing='disabled'/> </features> Qemu line: -machine pseries-rhel7.5.0,accel=kvm,usb=off,dump-guest-core=off,***resize-hpt=disabled*** Check in guest. [root@localhost ~]# cat /sys/kernel/debug/powerpc/hpt_order 25 [root@localhost ~]# echo 26 > /sys/kernel/debug/powerpc/hpt_order -bash: echo: write error: No such device Case 3: Set hpt resizing 'required' <features> <hpt resizing='required'/> </features> -machine pseries-rhel7.5.0,accel=kvm,usb=off,dump-guest-core=off,***resize-hpt=required*** -m size=1048576k,slots=16,maxmem=30670848k Check in guest: # cat /sys/kernel/debug/powerpc/hpt_order 23 # echo 22 > /sys/kernel/debug/powerpc/hpt_order # echo 23 > /sys/kernel/debug/powerpc/hpt_order # echo 24 > /sys/kernel/debug/powerpc/hpt_order # dmesg [ 3.098663] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [ 3.837938] random: crng init done [ 125.417972] lpar: Attempting to resize HPT to shift 22 [ 125.558357] lpar: HPT resize to shift 22 complete (105 ms / 34 ms) [ 147.561932] lpar: Attempting to resize HPT to shift 23 [ 147.694366] lpar: HPT resize to shift 23 complete (101 ms / 30 ms) [ 157.689604] lpar: Attempting to resize HPT to shift 24 [ 157.807051] lpar: HPT resize to shift 24 complete (103 ms / 13 ms) Case 4: Without hpt resizing defined, the hpt resizing should be enabled as default ??? Need Andrea's confirmation Qemu: -machine pseries-rhel7.5.0,accel=kvm,usb=off,dump-guest-core=off Attach memory device for several times. Check dmesg: [ 40.283171] random: crng init done [ 98.334835] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index 80000004 [ 98.334980] lpar: Attempting to resize HPT to shift 21 [ 98.458011] lpar: Hash collision while resizing HPT [ 98.458015] Unable to resize hash page table to target order 21: -28 [ 98.462263] lpar: Attempting to resize HPT to shift 21 [ 98.586851] lpar: Hash collision while resizing HPT [ 98.586856] Unable to resize hash page table to target order 21: -28 [ 98.591144] lpar: Attempting to resize HPT to shift 21 [ 98.717476] lpar: Hash collision while resizing HPT [ 98.717479] Unable to resize hash page table to target order 21: -28 [ 98.721934] lpar: Attempting to resize HPT to shift 21 [ 98.848081] lpar: Hash collision while resizing HPT [ 98.848085] Unable to resize hash page table to target order 21: -28 [ 98.870321] pseries-hotplug-mem: Memory at 40000000 (drc index 80000004) was hot-added [ 100.952201] pseries-hotplug-mem: Memory at 140000000 (drc index 80000014) was hot-added [ 101.660290] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index 8000001c [ 101.679231] lpar: Attempting to resize HPT to shift 24 [ 101.838251] lpar: HPT resize to shift 24 complete (104 ms / 54 ms) [ 101.856865] pseries-hotplug-mem: Memory at 1c0000000 (drc index 8000001c) was ... [ 102.440778] pseries-hotplug-mem: Memory at 2a0000000 (drc index 8000002a) was hot-added ... [ 108.295732] lpar: Attempting to resize HPT to shift 25 [ 108.517180] lpar: HPT resize to shift 25 complete (108 ms / 113 ms) [ 108.535865] pseries-hotplug-mem: Memory at 3c0000000 (drc index 8000003c) was hot-added Case 5: Set hpt resizing 'enabled' + memory hotplug/unhotplug 1. Start guest with setting: <maxMemory slots='16' unit='KiB'>30670848</maxMemory> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> .. <features> <hpt resizing='enabled'/> </features> <cpu> <numa> <cell id='0' cpus='0-1' memory='524288' unit='KiB'/> <cell id='1' cpus='2-3' memory='524288' unit='KiB'/> </numa> </cpu> qemu: -machine pseries-rhel7.5.0,accel=kvm,usb=off,dump-guest-core=off,***resize-hpt=enabled*** -m size=1048576k,slots=16,maxmem=3145728k 2. Check in guest: [root@localhost ~]# cat /sys/kernel/debug/powerpc/hpt_order 23 [root@localhost ~]# cat /proc/meminfo |grep Mem MemTotal: 1027200 kB MemFree: 616640 kB MemAvailable: 755328 kB 3. Attach memory device for 12 times # cat mem.xml <memory model='dimm'> <target> <size unit='KiB'>2048000</size> <node>0</node> </target> </memory> # virsh attach-device vm1 mem.xml Device attached successfully -repeat attach action for 12 times # virsh dumpxml vm1|grep memory -A5 <domain type='kvm' id='13'> <name>vm1</name> <uuid>ff1b78ff-90b7-4f0a-ad91-754de3e29309</uuid> <maxMemory slots='16' unit='KiB'>30670848</maxMemory> <memory unit='KiB'>11534336</memory> <currentMemory unit='KiB'>11534336</currentMemory> ... <memory model='dimm'> <target> <size unit='KiB'>2097152</size> <node>0</node> </target> <alias name='dimm0'/> ... <memory model='dimm'> <target> <size unit='KiB'>2097152</size> <node>0</node> </target> <alias name='dimm11'/> -- </memory> Check dmesg in guest [ 38.083064] random: crng init done [ 69.907160] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index 80000004 [ 69.907347] lpar: Attempting to resize HPT to shift 21 [ 70.036748] lpar: Hash collision while resizing HPT [ 70.036752] Unable to resize hash page table to target order 21: -28 [ 70.041112] lpar: Attempting to resize HPT to shift 21 [ 70.155946] lpar: Hash collision while resizing HPT [ 70.155950] Unable to resize hash page table to target order 21: -28 [ 70.160306] lpar: Attempting to resize HPT to shift 21 [ 70.276591] lpar: Hash collision while resizing HPT [ 70.276595] Unable to resize hash page table to target order 21: -28 [ 70.281015] lpar: Attempting to resize HPT to shift 21 [ 70.396415] lpar: Hash collision while resizing HPT [ 70.396419] Unable to resize hash page table to target order 21: -28 [ 70.418868] pseries-hotplug-mem: Memory at 40000000 (drc index 80000004) was hot-added ... [ 78.613840] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index 8000000c ... [ 99.696549] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index 8000001c [ 99.715087] lpar: Attempting to resize HPT to shift 24 *** [ 99.878489] lpar: HPT resize to shift 24 complete (107 ms / 55 ms) ... [ 118.859630] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index 80000024 ... [ 118.896709] pseries-hotplug-mem: Memory at 2b0000000 (drc index 8000002b) was hot-added [ 126.588153] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index 8000002c ... [ 145.176816] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index 8000003c [ 145.197701] lpar: Attempting to resize HPT to shift 25 *** [ 145.404822] lpar: HPT resize to shift 25 complete (105 ms / 101 ms) [ 145.423477] pseries-hotplug-mem: Memory at 3c0000000 (drc index 8000003c) was hot-added 4. Detach memory device for 7 times # virsh detach-device vm1 mem.xml Device detached successfully ... # virsh dumpxml vm1|grep memory -A5 <memory unit='KiB'>11534336</memory> <currentMemory unit='KiB'>11534336</currentMemory> <vcpu placement='static'>4</vcpu> <resource> <partition>/machine</partition> </resource> -- <cell id='0' cpus='0-1' memory='524288' unit='KiB'/> <cell id='1' cpus='2-3' memory='524288' unit='KiB'/> </numa> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> -- <memory model='dimm'> <target> <size unit='KiB'>2097152</size> <node>0</node> </target> <alias name='dimm7'/> ... </memory> ... <memory model='dimm'> <target> <size unit='KiB'>2097152</size> <node>0</node> </target> <alias name='dimm11'/> -- </memory> 5. Check dmesg [ 659.358504] pseries-hotplug-mem: Attempting to hot-remove 8 LMB(s) at 80000004 [ 659.366407] Offlined Pages 4096 [ 659.373573] Offlined Pages 4096 [ 659.380575] Offlined Pages 4096 [ 659.385384] Offlined Pages 4096 [ 659.390987] Offlined Pages 4096 [ 659.395271] Offlined Pages 4096 [ 659.399601] Offlined Pages 4096 [ 659.404056] Offlined Pages 4096 [ 659.406466] pseries-hotplug-mem: Memory at 40000000 (drc index 80000004) was hot-removed ... [ 1048.868678] pseries-hotplug-mem: Attempting to hot-remove 8 LMB(s) at 80000014 ... [ 1048.905530] Offlined Pages 4096 [ 1048.911061] Offlined Pages 4096 [ 1048.916390] Offlined Pages 4096 [ 1048.919104] pseries-hotplug-mem: Memory at 140000000 (drc index 80000014) was hot-removed ...... [ 1056.392723] pseries-hotplug-mem: Memory at 2b0000000 (drc index 8000002b) was hot-removed 5. Do detach once more. After about 10 seconds, this command returns successfully while previous detach commands can return at once. # virsh detach-device vm1 mem.xml Device detached successfully 6. Check guest dmesg [ 1076.485733] pseries-hotplug-mem: Attempting to hot-remove 8 LMB(s) at 8000002c [ 1076.489603] Offlined Pages 4096 [ 1076.496715] Offlined Pages 4096 [ 1076.501226] Offlined Pages 4096 [ 1076.505658] Offlined Pages 4096 [ 1076.510386] Offlined Pages 4096 [ 1076.514567] Offlined Pages 4096 [ 1076.518609] Offlined Pages 4096 [ 1076.520910] pseries-hotplug-mem: Memory indexed-count-remove failed, adding any removed LMBs ----? 7.Check guest xml and same as above. Below memory device should not exist in the guest, but it did. <memory model='dimm'> <target> <size unit='KiB'>2097152</size> <node>0</node> </target> <alias name='dimm7'/> 8. Retest above steps with hpt disabled and detaching memory device after server times will also get the error: [ 669.111481] pseries-hotplug-mem: Attempting to hot-remove 8 LMB(s) at 8000002c [ 669.113902] Offlined Pages 4096 [ 669.118115] Offlined Pages 4096 [ 669.122837] Offlined Pages 4096 [ 669.129005] Offlined Pages 4096 [ 669.134376] Offlined Pages 4096 [ 669.139373] Offlined Pages 4096 [ 669.141693] pseries-hotplug-mem: Memory indexed-count-remove failed, adding any removed LMBs I think this is a problem about memory hotunplug, not hpt resizing. Maybe it is the problem David memtioned in bug 1305400 comment 7. Please confirm. Andrea, could you help confirm above question in case 4 and case 5? And any other tests do you recommend? (In reply to Dan Zheng from comment #12) > Case 4: Without hpt resizing defined, the hpt resizing should be enabled as > default ??? Need Andrea's confirmation If the user has not configured HPT resizing explicitly, the guest will use QEMU's default. This happens to be "enabled" at the moment, and will probably not change going forward, but as usual it's up to the user requesting a feature explicitly if they depend on it. > Case 5: Set hpt resizing 'enabled' + memory hotplug/unhotplug > 1. Start guest with setting: > <maxMemory slots='16' unit='KiB'>30670848</maxMemory> > <memory unit='KiB'>1048576</memory> > <currentMemory unit='KiB'>1048576</currentMemory> > .. > <features> > <hpt resizing='enabled'/> > </features> > <cpu> > <numa> > <cell id='0' cpus='0-1' memory='524288' unit='KiB'/> > <cell id='1' cpus='2-3' memory='524288' unit='KiB'/> > </numa> > </cpu> > > qemu: -machine > pseries-rhel7.5.0,accel=kvm,usb=off,dump-guest-core=off,***resize- > hpt=enabled*** -m size=1048576k,slots=16,maxmem=3145728k > > > 2. Check in guest: > [root@localhost ~]# cat /sys/kernel/debug/powerpc/hpt_order > 23 > > [root@localhost ~]# cat /proc/meminfo |grep Mem > MemTotal: 1027200 kB > MemFree: 616640 kB > MemAvailable: 755328 kB > > 3. Attach memory device for 12 times > # cat mem.xml > <memory model='dimm'> > <target> > <size unit='KiB'>2048000</size> > <node>0</node> > </target> > </memory> > > # virsh attach-device vm1 mem.xml > Device attached successfully > > -repeat attach action for 12 times > > # virsh dumpxml vm1|grep memory -A5 > <domain type='kvm' id='13'> > <name>vm1</name> > <uuid>ff1b78ff-90b7-4f0a-ad91-754de3e29309</uuid> > <maxMemory slots='16' unit='KiB'>30670848</maxMemory> > <memory unit='KiB'>11534336</memory> > <currentMemory unit='KiB'>11534336</currentMemory> > ... > <memory model='dimm'> > <target> > <size unit='KiB'>2097152</size> > <node>0</node> > </target> > <alias name='dimm0'/> > ... > <memory model='dimm'> > <target> > <size unit='KiB'>2097152</size> > <node>0</node> > </target> > <alias name='dimm11'/> > -- > </memory> > > Check dmesg in guest > [ 38.083064] random: crng init done > [ 69.907160] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index > 80000004 > [ 69.907347] lpar: Attempting to resize HPT to shift 21 > [ 70.036748] lpar: Hash collision while resizing HPT > [ 70.036752] Unable to resize hash page table to target order 21: -28 > [ 70.041112] lpar: Attempting to resize HPT to shift 21 > [ 70.155946] lpar: Hash collision while resizing HPT > [ 70.155950] Unable to resize hash page table to target order 21: -28 > [ 70.160306] lpar: Attempting to resize HPT to shift 21 > [ 70.276591] lpar: Hash collision while resizing HPT > [ 70.276595] Unable to resize hash page table to target order 21: -28 > [ 70.281015] lpar: Attempting to resize HPT to shift 21 > [ 70.396415] lpar: Hash collision while resizing HPT > [ 70.396419] Unable to resize hash page table to target order 21: -28 > [ 70.418868] pseries-hotplug-mem: Memory at 40000000 (drc index 80000004) > was hot-added > ... > [ 78.613840] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index > 8000000c > ... > [ 99.696549] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index > 8000001c > [ 99.715087] lpar: Attempting to resize HPT to shift 24 *** > [ 99.878489] lpar: HPT resize to shift 24 complete (107 ms / 55 ms) > ... > [ 118.859630] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index > 80000024 > ... > [ 118.896709] pseries-hotplug-mem: Memory at 2b0000000 (drc index 8000002b) > was hot-added > [ 126.588153] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index > 8000002c > ... > [ 145.176816] pseries-hotplug-mem: Attempting to hot-add 8 LMB(s) at index > 8000003c > [ 145.197701] lpar: Attempting to resize HPT to shift 25 *** > [ 145.404822] lpar: HPT resize to shift 25 complete (105 ms / 101 ms) > [ 145.423477] pseries-hotplug-mem: Memory at 3c0000000 (drc index 8000003c) > was hot-added > > 4. Detach memory device for 7 times > # virsh detach-device vm1 mem.xml > Device detached successfully > ... > > # virsh dumpxml vm1|grep memory -A5 > <memory unit='KiB'>11534336</memory> > <currentMemory unit='KiB'>11534336</currentMemory> > <vcpu placement='static'>4</vcpu> > <resource> > <partition>/machine</partition> > </resource> > -- > <cell id='0' cpus='0-1' memory='524288' unit='KiB'/> > <cell id='1' cpus='2-3' memory='524288' unit='KiB'/> > </numa> > </cpu> > <clock offset='utc'/> > <on_poweroff>destroy</on_poweroff> > <on_reboot>restart</on_reboot> > -- > <memory model='dimm'> > <target> > <size unit='KiB'>2097152</size> > <node>0</node> > </target> > <alias name='dimm7'/> > ... > </memory> > ... > <memory model='dimm'> > <target> > <size unit='KiB'>2097152</size> > <node>0</node> > </target> > <alias name='dimm11'/> > -- > </memory> > > 5. Check dmesg > [ 659.358504] pseries-hotplug-mem: Attempting to hot-remove 8 LMB(s) at > 80000004 > [ 659.366407] Offlined Pages 4096 > [ 659.373573] Offlined Pages 4096 > [ 659.380575] Offlined Pages 4096 > [ 659.385384] Offlined Pages 4096 > [ 659.390987] Offlined Pages 4096 > [ 659.395271] Offlined Pages 4096 > [ 659.399601] Offlined Pages 4096 > [ 659.404056] Offlined Pages 4096 > [ 659.406466] pseries-hotplug-mem: Memory at 40000000 (drc index 80000004) > was hot-removed > ... > [ 1048.868678] pseries-hotplug-mem: Attempting to hot-remove 8 LMB(s) at > 80000014 > ... > [ 1048.905530] Offlined Pages 4096 > [ 1048.911061] Offlined Pages 4096 > [ 1048.916390] Offlined Pages 4096 > [ 1048.919104] pseries-hotplug-mem: Memory at 140000000 (drc index 80000014) > was hot-removed > ...... > [ 1056.392723] pseries-hotplug-mem: Memory at 2b0000000 (drc index 8000002b) > was hot-removed > > > 5. Do detach once more. After about 10 seconds, this command returns > successfully while previous detach commands can return at once. > # virsh detach-device vm1 mem.xml > Device detached successfully > > 6. Check guest dmesg > [ 1076.485733] pseries-hotplug-mem: Attempting to hot-remove 8 LMB(s) at > 8000002c > [ 1076.489603] Offlined Pages 4096 > [ 1076.496715] Offlined Pages 4096 > [ 1076.501226] Offlined Pages 4096 > [ 1076.505658] Offlined Pages 4096 > [ 1076.510386] Offlined Pages 4096 > [ 1076.514567] Offlined Pages 4096 > [ 1076.518609] Offlined Pages 4096 > [ 1076.520910] pseries-hotplug-mem: Memory indexed-count-remove failed, > adding any removed LMBs ----? > > 7.Check guest xml and same as above. Below memory device should not exist in > the guest, but it did. > > <memory model='dimm'> > <target> > <size unit='KiB'>2097152</size> > <node>0</node> > </target> > <alias name='dimm7'/> > > 8. Retest above steps with hpt disabled and detaching memory device after > server times will also get the error: > [ 669.111481] pseries-hotplug-mem: Attempting to hot-remove 8 LMB(s) at > 8000002c > [ 669.113902] Offlined Pages 4096 > [ 669.118115] Offlined Pages 4096 > [ 669.122837] Offlined Pages 4096 > [ 669.129005] Offlined Pages 4096 > [ 669.134376] Offlined Pages 4096 > [ 669.139373] Offlined Pages 4096 > [ 669.141693] pseries-hotplug-mem: Memory indexed-count-remove failed, > adding any removed LMBs > > I think this is a problem about memory hotunplug, not hpt resizing. Maybe it > is the problem David memtioned in bug 1305400 comment 7. Please confirm. Thanks to your detailed instructions, I managed to reproduce the issue quite easily. I agree with your assessment that HPT resizing is probably not the root cause here; moreover, it doesn't look like libvirt is doing anything particularly wrong here[1], so the problem is probably in either QEMU or the kernel. David, have you run into anything similar already? [1] Except for reporting "Device detached successfully" then the guest didn't actually release the device, but that might be a known limitation due to the way hot-unplugging work. I concur that HPT resizing isn't really relevant to this failure. I don't think it's the thing mentioned in bug 1305400 comment 7 either though (I've since confirmed that it's usually not possible to shrink the HPT below the initial size, though for reasons a bit more complicated than stated there). I think this is just the general problem that memory unplugs aren't guaranteed to work, because something unmovable might have occupied the memory region. There are some things in the works to improve that, but I don't think we should wait on that to verify this bug. According to comments 14 and comment 13, I mark it verified. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2018:0704 |